Page turner for music notebooks



Dec. 21, 1927.

- 1,653,634 W. KOOP PAGE TURNER FOR MUSIC NOTEBOOKS Filed Sept. 25. 1926 INVENTOR Wlfoop A 17' ORNE Y Patented Dec. 27, 1927.

UNITED STATES WILLIAM K001, OF NEW YORK, N. Y.

PAGE TURNER FOR MUSIC NOTEBOOKS.

Application filed September 25, 1926.

The main object of this invention is to provide a number of levers which are mounted on a piano and cooperate with each other by means of toothed sectors for the purpose of turning the leaf of a music book 180 degrees so that the reverse side of a leaf may be exposed to view.

The above and other objects will become apparent in the description below, in which i characters of reference refer to like-named parts in the drawing.

Referring briefly to the drawing, Figure l is a perspective view of a piano, showing the leaf-turning device mounted in place i thereon.

Figure 2 is a top plan view of the leafturning lever.

Figure 3 is a side elemtional view of the leaf-turning device.

Figure 4 is a perspective view of a metallic ear used upon the pages of a music hook. Figure 5 is a perspective view of an opened music book, showing the position of the ears. Referring in detail to the drawing, the

5 numeral indicates a beam which forms part of the musical instrument such as a piano or the like. These beams are ordinarily at available positions in the body structure of the piano and may have elements mounted thereon. Intermediate the length of the piano and in the center of the beam 10, a sector gear 11 is pivotally mounted on a. stud 12 which latter is anchored on and projects forwardly from the beam 10. Said sect-or gear has an arm 13 extending downwardly and radially therefrom. This arm has a handle bar 14 continuing from it at right angles. The arm 18 extends downwardly within the body of the piano and is entirely concealed and is bent at right angles beneath the body, the right angled eX- tending bar projecting forwardly beneath the keys and extending beyond the key board 15 so that the end of thebar may be manipulated by the hand or knee of the player. A lever 16 having a sector gear 17 at one end is poised and pivotally mounted on the body of the piano 18, the means of mounting said lever not being shown on the drawing. The sector gear 17 atone end of the lever 16 is provided with an opening 19 thru which a stud 20 passes for rotatably anchoring said sector in position above and in mesh with the sector gear 11. The lever 16 is substantially rectangular in cross section and has a bar 21 slidably mounted thereon, the

Serial No. 137,641.

bar being secured in any adjusted position by a screw 22. At the lower end of the bar 21, a permanent metallic magnet 23 projects toward the sector gear 17 beneath it and is adapted to come into contact with the short surface 24 of an ear which consists of a circular plate folded over on its diameter into two parallel extending plates 24 and 25 with a channel. 26 between them in which the page 27 of a music book is engaged. A bell crank 28 is mounted on a pin 29 at the lower end of the bar 21. This hell crank has one arm 30 sharpened into a wedgeshaped member and "s operativr behind and beside the permanent magnet 23.

The lower corners of each of the pages 2 of the music book are to be equipped with the metallic cars which are mounted in place by pinching the page in the channel 26. The lever 16 is rotatably mounted above the music book position by a stud 20 and swings in a horizontal path. The sector gear 17 on the lever 16 meshes with a second sector 11 formed at one end of the arm 13 which latter is adapted to be pivotally mounted on a beam 10 or similar available element in the structure of the piano. When the lever 16 is turned toward the left by rotating the arm l t in the left hand direction, the bell. crank 28 is rotated. so that the arm 30 extends vertically upward from its pivotal point. This permits the permanent magnet 23 to come into contact with the surface 24 of the ear mounted on the lowermost page of the music book, and after this contact between the ear and the permanent magnet has been established the member 14: is arcuately moved. This movement rotates the arm 16 180 degrees to the opposite side of the book. After this is completed the wedge-shaped arm 30 of the bell crank is rotated to horizontal position between the plate 25 of the ear on the uppermost page and the permanent magnets. so that the anchored permanent magnet 23 will be separated from the ear of the page it hasjust turned. The arm 14: may be thereafter rotated toward the right about the stud 12, swinging the lever 16 toward the right for a distance of 180 degrees, so that the page in contact with the permanent magnet will be rotated 180 -degrees to expose the succeeding page to view.

It is-to be noted that certain changes in form and construction may be made without departing from the. spirit and scope of the invention.

In a piano, a leaf turning device comprising a lever having a sector integral therewith at one end, an arm having a sector integral therewith, said sectors mutually intermeshing, a right-angled extending handle bar projecting from said arm, an additional bar mounted on said lever, metallic plates attached to a page, a permanent magnet rigid with the end of the last-named bar and adapted to contact with said plates, said magnet, after contacting with one of said plates, retaining said plate adhered thereto and carrying the page with said plate from right to left upon swinging said handle bar in the same direction, a right-angled oell crank pivoted at the end of said last-named bar adjacent said magnet and having one arm sharpened into a wedge, the other arm being adapted to be thrown into vertical position from a trictionally retained angular position when d handle bar is swung to its extreme position thus causing said Wedge to pass lJGtWCQn said magnet and plate to release said page trom the magnet.

In testimony whereof I aiiix my signature.

XVILLIAM KOOP. 

